499818993 has 4 divisors (see below), whose sum is σ = 666425328. Its totient is φ = 333212660.

The previous prime is 499818967. The next prime is 499819007. The reversal of 499818993 is 399818994.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 499818993 - 2⁵ = 499818961 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (499818953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83303163 + ... + 83303168.

It is an arithmetic number, because the mean of its divisors is an integer number (166606332).

Almost surely, 2^499818993 is an apocalyptic number.

It is an amenable number.

499818993 is a deficient number, since it is larger than the sum of its proper divisors (166606335).

499818993 is a wasteful number, since it uses less digits than its factorization.

499818993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166606334.

The product of its digits is 5038848, while the sum is 60.

The square root of 499818993 is about 22356.6319690601. The cubic root of 499818993 is about 793.6047375235.

Subtracting from 499818993 its reverse (399818994), we obtain a palindrome (99999999).

The spelling of 499818993 in words is "four hundred ninety-nine million, eight hundred eighteen thousand, nine hundred ninety-three".